Recycling nutrients from horse manure: effects of bedding type and its compostability
Keskinen, Riikka; Saastamoinen, Markku; Nikama, Johanna; Särkijärvi, Susanna; Myllymäki, Marianna; Salo, Tapio; Uusi-Kämppä, Jaana (2017)
Keskinen, Riikka
Saastamoinen, Markku
Nikama, Johanna
Särkijärvi, Susanna
Myllymäki, Marianna
Salo, Tapio
Uusi-Kämppä, Jaana
Julkaisusarja
Agricultural and food science
Volyymi
26
Numero
2
Sivut
68-79
Scientific Agricultural Society of Finland
2017
Tiivistelmä
Manure constitutes a nutrient resource that should be efficiently recycled in agriculture. We assessted the nutrient cycling properties of three bedding materils (peat, wood shavings and pelleted straw) in horse manure by comparing their compostability, ability to retain nitrogen (N) and phosphorus (P) under rainfall and capacity to release N when mixed with soil. Manure with pelleted straw bedding had superior composting characteristics as it lost half of its dry mass, reached temperatures >60 oC and ended up having a carbon (C) to N (C:N) ratio of <15. In percolated water, 4-11% of total manure N and 5-23% of total manure P was leached during a 2 h 15 min event of artificial rainfall. Peat manure was most susceptible to P loss. In all fresh manures, C:N ratio exceeded 30, which led to net N immobilization in soil. Composting decreased the C:N leading to a slight positive or an insignificant fertilizer effect.
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